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Engineering Conference. The Application of Compressed Air and Steam to Rock Drilling. Mr. W. F. Stevenson. Lawrence Scientific School, Room...
Engineering Conference. The Application of Compressed Air and Steam to Rock Drilling. Mr. W. F. Stevenson. Lawrence Scientific School, Room...
Coxswain, Rock...
Engineering Conference. The Application of Compressed Air and Steam to Rock Drilling. Mr. W. F. Stevenson. Lawrence Scientific School, Room...
...Thursday.Engineering Conference. The Application of Compressed Air and Steam to Rock Drilling. Mr. W. F. Stevenson. Lawrence Scientific School, Room...